Seismic behavior of steel tube reinforced concrete bridge columns

다국어 초록 (Multilingual Abstract)

This paper reports an experimental study that was accomplished to assess the seismic behavior of steel tube reinforced concrete bridge columns (SBCs). The motivation of this study was to verify a supposition that the core steel tube may be terminated at a rational position in the column to minimize the material cost while maintaining the seismic behavior of this composite column. Four SBC specimens were tested under combined constant axial load and cyclic reversed lateral loads. The unique variable in the test matrix was the core steel tube embedment length, which ranged from 1/3 to 3/3 of the column effective height. It is observed that SBCs showed two distinctly different failure patterns, namely brittle shear failure and ductile flexural failure. Tests results indicate that the hysteretic responses of SBCs were susceptible to the core steel tube embedment length. With the increase of this structural parameter, the lateral strength of SBC was progressively improved; the deformability and ductility, however, exhibited a tendency of first increase and then decrease. It is also found that in addition to maintained the rate of stiffness degradation and cumulative energy dissipation basically unchanged, both the ductility and deformability of SBC were significantly improved when the core steel tube was terminated at the mid-height of the column, and these were the most unexpected benefits accompanied with material cost reduction.

참고문헌 (Reference)

1 Wenliang Qiu, "Seismic responses of composite bridge piers with CFT columns embedded inside" 국제구조공학회 15 (15): 343-355, 2013

2 Paultre, P., "Seismic performance of circular high-strength concrete columns" 106 (106): 395-404, 2009

3 Choi, E., "Seismic performance of circular RC columns retrofitted with prefabricated steel wrapping jackets" 65 (65): 1429-1440, 2013

4 Hsu, Y.T., "Seismic effect on highway bridges in Chi Chi Earthquake" 18 (18): 47-53, 2004

5 Ji, X.D., "Seismic behavior and strength capacity of steel tube-reinforced concrete composite columns" 43 (43): 487-505, 2014

6 Han, L.H., "Performance of concrete-encased CFST short columns under axial compression" 93 (93): 62-76, 2014

7 Saiidi, M.S., "Low-damage precast columns for accelerated bridge construction in high seismic zones" 21 (21): 04015056-, 2016

8 China, C.P., "JTG/T B02-01-2008: Guidelines for seismic design of highway bridges" China Communications Press 2008

9 An, Y.F., "Flexural performance of concrete-encased concrete-filled steel tubes" 66 (66): 249-267, 2014

10 Wu, K., "Failure mechanism and bearing capacity of transfer columns in SRC-RC hybrid structures" 17 (17): 205-228, 2013

11 Xilin Lu, "Experimental study on hysteretic properties of SRC columns with high steel ratio" 국제구조공학회 17 (17): 287-303, 2014

12 Guo, Q.Q., "Experimental study on eccentric compressive property of steel tube-reinforced concrete columns" 34 (34): 103-111, 2013

13 Ibrahim, A.M.A., "Experimental study on cyclic response of concrete bridge columns reinforced by steel and basalt FRP reinforcements" 20 (20): 04015062-, 2016

14 Qiu, W.L., "Experimental study of seismic performances of RC bridge columns with CFST column embedded inside" 23 (23): 212-219, 2015

15 Kai Wu, "Experimental research on seismic behavior of SRC-RC transfer columns" 국제구조공학회 21 (21): 157-175, 2016

16 Hashimoto, S., "Damage analysis of Hanshin expressway viaducts during 1995 Kobe Earthquake. II: damage mode of single reinforced concrete Piers" 10 (10): 54-60, 2005

17 Shim, C.S., "Cyclic behavior of prefabricated circular composite columns with low steel ratio" 33 (33): 2525-2534, 2011

18 Choi, E., "Behavior of reinforced concrete columns confined by new steel-jacketing method" 107 (107): 654-662, 2010

19 곽지현, "Behavior of circular CFT columns subject to axial force and bending moment" 국제구조공학회 14 (14): 173-190, 2013

20 Nie, J.G., "Analyses on composite column with inside concrete filled steel tube under axial compression" 38 (38): 9-13, 2005